Phonograph



Dec. 18. w23. "3. SEIFFERT PHONOGRAPH Original Filed Deo. 9. 1919 2Sheets-Sheet 2 @Bono-nemmeno@ New "roi/"or, 1

Application man necmber e, wie, semi To aZZ whom it may concern.'

Be it lknown tha I, GEORGE SErrrn'r, o resident of the city {1f-NervYork, county or' New York and Strafe of NewYork, have invented a new anduseful mprovement Yin Pilonographs, of which the following is especification.

The object of this invention is to provide a sound bor which opere-.tesupon com pressedeir ,which is regulated in such :i manner that the soundor music recorded in a record ima'7 be faithfully reproduced with :mydesire( loudness according to the adjustment of the apparatus.

This and 'other objects ere accomplished by my invention, oneembodiment4 of which. is hereinafter more purtioulary set forth.

For a more detaileddesc'ription of m51 invention, reference is to be hadto the decoron panying drawings,' forming e. part hereof7 fn which-Figure l is a side elevation of a part of a phonograph embodyingniyinveution.

Figure 2 is a plan View of the sound box, tone arm and air pressure pipeof the same.

Figure 3 is amend elei'eion of he stru@ ture shlwn in Figure 2.

Figure 4 shows the interior of the ,sound box when the oover is removed.i

Figure 5 is an enlarged .section taken on the line S-vof Figure l,lookingF in the direction of the arrows.

Figures G and 7 are sections taken on the lines 6-6 and 7-7 respectivelyor Figure 'looking; in the direction oi ihe arrows.

Figure 8 is o. sectional `View, miren on the line 8-8 l Figure 17,lookingl in lle dir-ee;-A ion orLx the arrows.

Figure 9 shows a fixed greife surface of the sound box.

Throughout the various views of 'the drawings, similar referencerharucers designare similar pars.

My improved phonograph l is provided with the Conveutionulurn table Z onWhirl: is placed a. record il, in the convenlionel manner, which recordhas its groove engaged by a needle 4 fixed in a needle holder 5 by theusual set screw 6. The needle holder 5 is secured "ao the sound box 7,and hi's sound box has a, lower connection with the tone arm 8 und :inupper connection with the. compressed air pipe 9. This tone arm Sand thecompressed air pipe 9 always move with polished "Lire I), ine

over the record4 23.

rlhe needle holder. 5 has e spring 'l0 se,

cured 'rigidly Jrhereo bv o suiehle Vholding -niezlus :is bruzing orwelding' hind his has a laterally extending longue li ai, itsoenerandhuerellyexieiulingenl are parallel to he 5 neue 535e extend onlyo or Figure is spiinroll for ihe rzed 'il i xmsi M1 l Y 4 Y lhe ends l?)hel which e secured so box by cap screws l5 si parts rigidly in place.

In the preerred e vention.

downwar ijf extending l needlel hoh u tapering plus whir :i grning l@which grating l.H the.'

springv 'l0 reo the sound ho:

lends lai/era when the l urns are sopor fluence ol'a il e needle l ismore or rese o or sound mil is 'he record 'if the graiugs lf2' sind vie.sume material, l here 'lo in lucy will not 'funclion properly :ind v isessential silver and a grating i9 made of aluminum. Both or' thesegratings are highly polished so as to form a tight joint together, asabove described.

ln the preferred embodiment of my invention the grating 17 is held in aplate 23 which in turn is placed between two rubber gaskets '24 and 25and joined by screws Q6 which. run from the interior of the sound box 7and through the gaskets 24 and Q5 and plate 23 to a boss 2." towhich thetone arm 8 is secured by a sliding ht in the Couven-2 tional manner.lThe upper part of the sound box 7 is provided with an integral boss 28which is screw threaded on its exterior to receive a union. 29 whichsecures the air pipe 9 in the conventional manner. The upper part ot"the grating 'i7 may be Yfurther se-` cured by suitable screws 30 and itis prefcrable to provide the interior of the sound box 7 between the airpipe 9 and the tone arm 8 with a filtering screen 3]. which will preventdust from getting at the gratings 17 and 19 and interfering with theiraction.

lt will be noted that the upper extension 18 ofthe needle holder 53projects through a corresponding opening in the boss 27 so that thisneedle holder may swing at its fulcrurns 20, to any desired extent,Without having any Contact with the boss. in the embodiment of myinvention here illustrated the needle point takes a zig-zag course.

The sound box 7, on its front, is provided with a screw cap 32 which hasan interior lining 33 of rubber or similar material to act as a cushionand to facilitate the formation of a tight joint so that air passingthrough the sound bou will neither leal; nor maire a noiseIn l In viewof the foregoing, the operation of my improved instrument will bereadily understood. Assuming that the sound box is as shown and that arecord 3 is revolving on the table 2 and imparting the usual/movement tothe needle 4, the gratings 17 and,

i9 will approach und separate according to the irrervuiarities of therecord and as they approac or separate7 air under pressure passesthrough the sound box Y and at the gratings sounds the note or music ofthe record and faithfully reproduces the saine.

record.

The loudness with which this reproduction takes place will depend on thepressure of the air in thepipe 9 and the tension of the spring 11 underthe iniiuence of the screw 21. By changing either or both of thesefactors, the loudnessot the music or noise in the tone arm may becorrespondingly changed.

While l have shown and described one em# bodiment of my invention, it isobvious that it is notl restricted thereto, but that it isv broad enoughto cover all k,structi'lres that come Within the scope of the-ann sedclaims. Having thus described my invention what l claim is:

1. A sound box having an air pipe at its topand a tone'arm at itsbottom, aGerman silver grating 'rigidly secured to the .sound box and analuminum grating adjacent tothe other grating and mounted 'so as tovibrate according yto a record.

2. A sound box oi the class speeitied having a fixed grating of Germansilver and a movable 'tapering gratingl of aluminum 'and means forcausing the movable grating to vibrate according to a record.v

3. A sound. box of the class specied hav,- ing a fined grating of Germansilver and al movable grating of diere-nt material and means for causingthe movableV grating to vibrute according to a record.Y

fi- A sound box of the class specified having a. fixed grating of amaterial which will not change under atmospheric conditions and amovable grating of a diti'erent material which will notl change 'underatmos-j encuen serrurier..

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